Some Facebook users seemed baffled by the message, with others explaining that a meteor shower in the far north was behind the post.

Russell Garrard joked that fears of a tsunami might have been linked to "some podgy short daddy's boy getting into the nuclear weaponry again" - a reference to North Korean leader Kim Jong-un's recent nuclear tests.

The Bureau of Meteorology also received calls overnight, but it's unaware of a meteor actually hitting the ground.

"It sounds like someone has seen a meteor and reported it and had some concerns about tsunamis, which seems a bit strange to me unless it was a large lump of rock," forecaster Gordon Banks told AAP.